Power transmission



June 2, 1925. 1,540,720

" c: E. BUCKBEE POWER TRANSMISSION Filed Jan. 5. 1924' W v. '4 I "w xy:f Fig 3 Inven co-r F1654 -WMWSP Patented June 2,- 1925.

UNITED STATES.

CHARLES E. .BUGKBEE, OF DETROIT, MICHIGAN.

rowan trRAnsMIssIoN.

Application filed January 5-, 1924. Serial No. 684,659..

To aZZ whom it may concern Be it known that 1, CHARLES E. BUoKBEn, acitizen of the United States, residing at Detroit, in the county ofVVayn-e and State of Michigan, have invented a certain new and usefulImprovement in Power Transmissions, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings.

My invention relates to power transmission and the principal object ofmy invention is to produce a new and improved arrangement formaintaining tight the belt operatively connecting two or more machineelements. In the drawings accompanying this specification and forming apart thereof I have shown, for-purposes of illustration, one form whichmy invention may assume. In these drawings: I

Figure 1 represents a side elevation of this illustrative embodimentv ofmy invention, while Figures 2, 3, and 4 are sections respectively on thelines 2-2, 3-3, and 44 of Figure 1.

In the drawings I have illustrated my invention as applied to thatcombinatin of machine elements wherein an electric motor 11 acts as thedriving element, a gas compressor 12 as the drlven element, and themeans for transmitting power is a belt 13 passing over a pulley (notshown) on the shaft 14 of the motor 11 and a pulley 15 on the shaft 16of the compressor 12.

The motor 11 is herein shown as supported from the unit base 17 by meansof a movable connection comprising a fixed base 18 rigidly secured tothe unit base 17, a movable base 19 rigidly secured to the motor 11, anda plurality of parallel links 20 each pivoted at one end to the fixedbase 18 and at the other end to the movable base 19. In the embodimentherein illustrated these parallel links 20 are shown as four in numberarranged in two pairs disposed respectively at the two ends of the bases18 and 19, the pair of links 20 and 20 at the inner end of the bases 18and 19 are pivoted to the fixed base 18 by means of a bolt 21 passingthrough apertures 22 and 22 in the links 20 and 20 and apertures 23 in apair of ears 24 rising from the base plate 18 and to the movable base 19by means of a bolt 25 passing through apertures 26 and 26 in the links20 vtures 22 and 22 and apertures 23 in a second pair of ears 24 v base18 and to the and .20 and apertures 27 in a pair of ears movable base19, 20 and 20 by means of 28 depending from the and the outer pair oflinks are pivoted to the fixed base 18 a bolt 29 passing through aperinthe links 20 and 20 rlsing from the fixed movable base 19 by means of abolt 30 passing through the apertures 26 and 26 in the links 20 and 20and the apertures 27 in a second pair of ears 28 depending from themovable base 19.

Formed integral with the head 31 of the bolt 30 is an arm 32 madeunitary with the link 20 by a pin bolt 30 and link 20. To the free endof this arm 32 is pivoted, by means of a pivot pin 34, a rod 35 whichextends diagonally upward and through the aperture 36 in a head 37'formed integral with the bolt 25 and is surrounded by a spring 38compressed between the head 37 and a nut 39 adjustable along the screwthreaded portion 40 of the rod 35. I

Formed integral with the head 41 of the bolt 29 is an arm 42 madeunitary with the link 20 by means of a pin 43 rigidly connecting thebolt 29 and the link 20. This arm 42 is shaft 44 of an idler pulley 45whereby the shaft 44 of the idler pulley 45 may be clamped to the arm 42in any desired position.

From the above description it will be understood that the weight of themotor 11 carried thereby. It will be readily under stood, therefore,that the weight of the motor is constantly acting to maintain the belt13 tight both by constantly acting to move the motor 11 further from thecompressor 12 and by constantly acting to raise the idler pulley 45 toincrease the length of the belt path, and in addition it will beunderstood that the constantly increasing opposition of the spring 38 tothe action of the motor 11 as the motor 11 moves downwardly and acts 33rigidly connecting theprovided at its free end with a I slot 46 arrangedto adjustably receive the' movement of the motor It will be obvious tothose skilled in theart that the particular embodiment herein shown anddisclosed may be variously changed 7 and modified without sacrificingthe advantages of my inventlon or departing from the spirit thereof andit will therefore be understood that the disclosure herein isillustrative only and my invention is not limited thereto.

I claim:

1. In combination, a driven element, a driving element, a beltoperatively connecting said elements, an idler pulley engaging saidbelt, andmeans supporting one of said elements and said idler pulley insuch man-- ner that it continally tends to move, under the influence ofits own weight, in a direction to directly tighten said belt and inaddition to force said idler pulley against said belt to further tightensaid belt, and a spring connected to maintain the tightening forcesubstantially constant over the range of movement ofsaid element.

23 h combination, a driven element, a

driving element, a belt o'peratively connecting said elements, an idlerpulley engagin said belt, and means supporting one of sai elements andsaid idler pulley in. such manner that said element continually tends tomove, under the influence of its own wei ht, in a direction to forcesaid idler pu ey against said belt to thereby tighten said belt, and aspring connected to maintain the tightening force substantially constantover the range of movement of saidelement. 3. In combination, a drivenelement, a driving element, a belt operatively connecting said elements,means supporting one of said elements in such manner that it continuallytends to move, under the influence of its own weight, in a direction totighten said belt, and a spring, connected between two moving parts ofsaid support between which the distance varies upon belt tighteningmovement of said support, to maintain the tightening force substantiallyconstant over the range of movement of said element.

In testimony whereof, I hereunto aflix my signature.

CHARLES E. GKBEE."

